Nut-lock.



P. G. RAPP & P. H. KING.

NUT LOCK.

APPLICATION FILED JAN. 11, 1911,

Patented Mans, 1912.

p INVYQTORS ATTORNEY PETER G. RAPP .AND PETER H. KING, CHICAGO,ILLINOIS.

NUT-LOCK.

To all 'whom t may concern Be it known that we, PETER Gr. RAPP and PETERI-I. KING, citizens of the United States, residing at Chicago, in thecounty of Cook and State of Illinois, have invented a new and usefulNut-Lock, of which the following is a specification.

This invention has reference to improvements in nut locks, and itsobject is to provide a device for the purpose requiring a minimum changein an ordinary nut, but which change may be readily made in existingnuts, or the nuts may be readily formed in the course of manufacture toadapt them to the present invention.

In accordance with the present invention there is provided a nut havinga seat or vsocket at one side of the threaded bore of the nut andopening thereinto and on the side of the seat remote from the threadedbore of the nut it is entered by a slot which may be readily formed byan ordinary milling tool, the purpose of the slot being to admit of amanipulating pin to turn a dog lodged in the seat in a manner to cause atooth on the dog to bite into the threads on the shank of the bolt whenthe nut has been screwed thereon to the proper extent and it isdesirable to lock the nut against movement tending to unscrew it. At thesame time the designed unscrewing of the nut is readily brought about bythe use of the manipulating pin, which will draw the dog out ofengagement with the threads on the bolt and the nut may be thenunscrewed or, if desired, the nut may be screwed tighter at any time,the screwing of the nut on the bolt rendering the dog then inactive, butthe latter may be brought into active position by the proper applicationof the manipulating pin.

The invention will be best understood from a consideration of thefollowing detailed description, taken in connection with theaccompanying drawings forming a part of this specification, with theunderstanding, however, that while the drawings illustrate an operativeform of the invention, the latter is not confined to the exact detailsof construction illustrated..

In the drawings 1-Figure 1 is a side view of a bolt with the nutprovided with the improved nut lock applied thereto. Fig. 2 is a sectionon the line .2 2 of Fig. 1 but drawn to an enlarged scale. Fig. 3 is asection similar to that of Fig. 2, but with a Specification of LettersPatent.

Application filed January 11, 1911.

Patented Mar. 5, 1912.

Serial No. 602,040.

part of the nut in section on the line 3--3 of Fig. 1. Fig. 4 is aperspective view of the locking dog on substantially the same scale asFigs. 2 and 3.

Referring to the drawings, there is shown a bolt 1 which may beconsidered as typical of any threaded rod, stud or bolt designed toreceive a nut, the threaded portion of the bolt being indicated at 2,and the nut adapted to such threaded portion of the bolt being indicatedat 3. It will be observed that the nut is shown as of the usualhexagonal type, but the invention is not necessarily limited to thisparticular type of nut.

There is produced in the body of the nut at one side of thecentralfthre'aded portion of the nut a cylindrical recess or seat 4opening at the engaging face of the nut and extendingthereinto inparallel relation to the longitudinal axis of the nut for an appro=priate distance, say anywhere from one-half to three-fourths the depthof the nut, but this distance may vary from the particular relationmentioned. In the particular in-y stance shown, the recess 4 has itscenter line radial to the longitudinal axis of the nut and cutting oneof the angles of the hexagonal exterior to the nut, and while this is apreferred location, the seat or recess 4 may be otherwise located.

At one side of the seat or recess 4 there is formed a passage 5 openinginto the interior or bore of the nut and of substantially the samelength as the recess 4, but of less diameter than the said recess. Theseat 4 is designed to receive a dog 6 of general cylindrical form, whichdog is of a length to wholly seat in the recess 4 and is of a diameterto closely and yet freely fit in the seat 4, so as to turn about thelongitudinal axis of said seat.

Along one side the dog 6 is formed with a longitudinal tooth 7 and oneach side of this tooth the periphery of the dog may be flattened asindicated at 8 and 9, respectively, although this particularconstruction is not mandatory. The dog 6 may be formed from anappropriate shaped rod or may be rolled or pressed into shape, or may beformed in any appropriate manner, but the tooth 7 need not extend beyondthe periphery of the dog if the periphery be considered as circularthroughout its circumferential extent, for the projection of the toothis ample since the inner walls of the seat 4 may be so related to thebore of the nut as to enter such bore for a short distance were the saidwalls continued across the passage 5.

That side of the seat et remote from the bore of the nut is entered by atransverse slot 10 which may consist of a` simple channel ofconsiderably less width than the length of the seat 4L, although therelative proportions may be varied within wide limits. rlhe dog 6 isprovided on the side remote from the tooth 7 with a socket 11, which,when the dog is properly seated in the recess 4 is coincident with theslot 10, and this socket l1 is designed to receive one end of amanipulating pin indicated in dotted lines 12 in Fig. 3, the pin beingpassed through the slot 10 and into the socket ll, when by a movement inthe direction of the length of the slot 10 transversely of the seat 4Lthe dog may be rocked on its longitudinal axis sufficiently for thepurposes of the present invention.

Let it be assumed that the nut 3 has been screwed upon the threaded end2 of the bolt or like device to the proper extent, and it is desirableto then lock t-he nut against rotation in the opposite direction whichwill tend to loosen the nut. Vhen the nut is applied to the threaded end2, the dog 6 may be already seated in the recess 4, but there is notendency to rotate the dog when the nut is being screwed to its properposition, and in fact the nut may be screwed in either direction at willwithout interference from the dog. However, after the nut has beenscrewed to the position desired, the pin 12 is inserted in the socket l1of the dog and the said socket is then rocked on its longitudinal axisin the desired direction to bring the tooth 7 into engagement with thethreads of the bolt, the slot 10 being long enough to permit such actionot' the pin and dog. The result of this is that the tooth 7 is forcedinto the exposed threads at the passage 5, since these threads are then`in the path of rotative movement of the tooth 7, and the said tooth 7sinks more or less into the edges of the threads and the dog becomeslocked to the threads, in turn locking the nut against reverse turning,which latter movement only tends to sink the tooth of the dog deeperinto the threads of the bolt. This will be apparent from an inspectionof Fig. 3 where the movement of the nut in unscrewing from the bolt isclockwise, and while the angle of the tooth 7 to the threads is suchthat this tooth will not spontaneously bite into the threads on theunscrewing movement of the nut, it may be made to bite into the threadsby turning the dog 6 also in a clockwise direction as viewed in Fig. 3,so that the tooth 7 is caused to bite into the threads of the bolt andthen a further rotative movement of the nut to unscrew from the boltwill only tend to more firmly engage the dog with the threads et thebolt. Should it be desirable to loosen the nut, it is only necessary tomove the nut in the direction to screw it on to the bolt if there bespace for such movement, and this will loosen the dog from the threadsof the bolt, o-r the dog may be loosened by a proper use ot the pin 12,to rotate the dog in a counter-clockwise direction, so that the tooth 7is moved out ot active relation to the threads of the bolt and the nutmay then be moved in either direction at will without interference fromthe dog.

Vhat is claimed is l. In a. nut lock, a nut provided with a longitudinalrecess parallel to and encroaching upon the central threaded bore of thenut, the recess open to one end tace of the nut and closed at the otherend, and a. pawl of general cylindrical shape to seat within the recessand cut away upon intersecting planes generated by lines parallel to theaxis of the cylinder to form a longitudinal tooth conlined within thecylindrical periphery of the pawl, the pawl also provided on the sideopposite the tooth and intermediate its ends with a socket, the said nuthaving a slot formed through its outer wall cutting the recesstransversely in line with the socket and on the side remote from thebore of the nut.

2. In a nut lock, a nut provided with a. longitudinally disposed seat orrecess parallel with and at one side of the threaded bore of the nut,said seat or recess extending trom one end tace of the nut toward butterminating short of the other end face of the nut and opening into thethreaded bore of the nut, the said nut being provided with a slot orpassage leading from the cylindrical seat to the exterior oit the nutintermediate of the ends of the nut, said slot extending to each side ofthe seat and entering the same at a point remote from the point ofcommunication of the seat with the bore of the nut, and a cylindricalpawl having a tooth formed along one side thereof, said pawl beingadapted to the cylindrical seat in the nut with the tooth in position toenter the bore of the nut through the passage connecting the seat withsaid bore and said pawl being provided with a socket on the side remotetrom the tooth in position to be entered by a manipulating memberintroduced through the intermediate slot in the nut.

3. In a nut lock, a nut provided with a longitudinally disposedcylindrical seat opening at one end face of the nut at one side of andcommunicating with the threaded bore of the nut with the longitudinalaxis of the seat less distant from the corresponding side of the bore ofthe nut than the radius of said seat, and a cylindrical dog having atooth along one side Within the confines of the cylindrical periphery ofthe dog, the said dog being adapted to the seat With the tooth movableinto the bore of the nut and having Walls on either side o' the toothflattened, and the dog being provided on the side remote from the toothwith a socket for the introduction of a manipulating tool, the said nuthaving formed therein a slot or recess intermediate of the end faces ofthe nut and entering the cylindrical seat or socket on the side thereofremote from the bore of the nut.

In testimony, that We claim the orego- 15 ing as our own, We have heretoafHXed our signatures in the presence of two Witnesses.

PETER G. RAPP. PETER H. KING. Witnesses:

JOSEPH R. SHINNICK, JULIUs CUNRADO.

Copies of this patent may be obtained for ive cents each, by addressingthe "Commissioner of Patents, Y

Washington, D. C.

